1. Thinking you are done pooping, finished wiping, about ready to leave the bathroom when you realize you have another round of poop coming.
2. Thinking you could not possibly have any more poop left after a big dump but suddenly realizing there is sequel.
3. Needing to poop again within 20 minutes of your previous poop.
1. I stood up and was about to wipe when I realized I needed to immediately sit down again, a second wave poop was coming.
2. After a long night of partying I know better than to end a poop early. There is always a second wave poop.